Ha-jime nagashima



UNITED STATES PATENT OFFICE.

HAJIME NAGASHIMA. 0F TAPANEE, NANSHINSENKEI SAIRI, TAINAN, FORMOSA, ASSIGNOR TO TAINAN SEITO KABUSHIKI KAISHA, OF TOKYO, JAPAN.

PROCESS OF MANUFACTURING SULFID DYE FROM FILTER CAKES 0F SUGARJUICE.

1 ,soe ss 2.

No Drawing.

To all whom it may coma 7'14 Be it known that l, HAJLMi-J NAQASHIMA, subject of the Emperor o'l. Jupun, residing at: 'l'upamec, Nuushinsenkci Sniri, 'luinun, l ormosu, have invented new and useful lm provemcuts in Processes 01 illuinlfucturingi Sulfid Dye from hiltcrlleluis of Sugar- Juice. of which lhe following is 21. specification.

This invention relates to :1 process cl mun ul'ucturing u. sulfid dye from filter cakes of sugar luctm'ies and consists first in heating such elics, adding thereto hydrochlm'ic :urid, nitric, acid or the like, time dissolniug the lime contained therein and then after wash" ing it with water. again heating it and adding thereto either caustic alkali and sulfur, or polysullid of an alkali metal. The object of my invention is to utilize the heretofore useless filter cakes of sugar fuctorics and to obtain thcrcfronii cheaply and with simple Work u permanent dye-stuff by removing the'lime contained therein.

The following is un example of carrying my invention into I .uctice:-

I. Extraction of lime-"Powder in a tour tar, or by a roller if necessary filler cakes which remain when heated juice of sugar cane has been filtered by adding thereto lime, lime salt, or any such deforming agent and knead the same into a homogeneous paste. Put this paste in a wooden tub or cask, add thereto nitric acid, and heal it. by means of steam until the boiling point is reached. Then stop the steam but allow chemical change to continue and dissolve the lime. The quantity of the acid to be added must not; be more than is necessary to mentralize the alkali contained in the filter cake, otherwim the material itself Will become soluble, and a. great difficulty will be encoun tered in washing and filtering it. The use of nitric acid, moreover, makes the Work of filtering, Washing and sulfurating easy, and it gives a product of good quality. The filtering is made easy because the nitrogenous matters contained in the filler cake are coagulated by the nitric acid, and the sul- -furuting is made easy and a product of good quality is obtained, because organic com pounds having nitric or nitrous base are formed.

2. Filtering and washing.-To filter and wash the usty substance boiled together with an acid, there is no need of using any Specification of Letters Patent.

Application filed October 9, 1917,

Pet cntcd July 1 1919.

Serial No. 195,649.

filtering apparatus. If the paste is put in a bag of linen or cotton and if the lug is left suspcluliug, lhc .i'cighl of the paste it self will squcczc mu the water. The WilSl'r jug too is uol required lo be lliormigh, as what, small quziutityol avid i'cn'niiuiug will bc ucul mlized in the succeeding operation.

Berlin/Ilium opcmfiom---Mi f powdm'cd sulfur and caustic soda will: 'lh pusic. from uhich the water is suucczw'l out us for as possible.- (lhc paste still coulza niug Walte M 16 to 130%), and dry llle mixture in a flu pain stirring it all thc tizuc uuil if llLlfUlJlUH grains. Powder these grains by any suit able means and heal the powdered mixture again keeping the sulfur in melted condition. Then raise the heat further and v0lu-- tilizc the surplus sulfur. If the process of sulfuruting is carried on in an air tight apparatus instead of in :1 that pun, the quan lily of sulfur used may be ecmmmized.

In this invention, in order to extract lime hyi'lrocliloric acid only be used instead of nitric acid, or hydrochloric acid may be first used and (hen the material may be treated with nitric acid. Again in lhc sulfuruling process, the filter cadres may be mlXcd with powdered sulfur. and after drying: this mixture caustic alkali may be added; or lhc pasty substance may he first dissolved with austic alkali and then sulfur added thereto: or u polysullid of an alkali metal may be utilized and need in place of sulfur and caustic alkali, any of the ubovc operations attaining the szuuc object.

In this invention, filter cakes of juice cf sugar cane are first mechanically broken by crushers, pressure rolls, or the like. It then acquires a. condition in which it can easily be sulfurated. Moreover, the formation of substances such as calcium sulfid which is very injurious to color, is prevented when lime is extracted by boiling the substance in an organic acid, Thus the desired color can be obtained very economically and by a very simple process. The yield too is very high.

Having now particularly described my said invention, what I claim and desire to have protected by Letters Patent is as follows l. A process of manufacturing a sulfid dye-stuff from filter cakes of juice of sugar cane consisting in extracting lime from such cakes by boiling same in an inorganic acid and washing away Hm limo Salt prmlnced with water; and then in heating the same after" adding 'iiliul'efl) sulfur and an Halli, HlJhF-TRIHMHA :m rind fur [he purposes heroin imfmu Hut forth.

A n'nmxs ui unuiui'nrtm'ing r1 snhid dyiwtufl from filll'l' cukus 0f the juice Hf sugar mm which wnsisats in adding to the Mk0 an avid in nvuimlixo the alkali in 1m whe dis-isnhii'ig ihu ling: cunbuinm] tiiwluin, and Hum :uli'iiug' mlfiliand alkali 3. A })11)(JH:-;:- ui' manufmituring a sniiid dye-stuff fmm filtu' ilkfiR of the juice of 511 111 cane whivh mnsista in boiling the.

l f- (r-uces in nitric avid adding? thmurn sulfur and :nu i'iisoda, and than limiting the mixtum.

A prowess of HHUHIl il tiillllifl u suifid dye-stun from Him nukes ni' 11w jail-v of Sugar vane whivii :imhists in hailing the Fakes: in .Ili inm'gunir: m'iil :imi H midng aiwav the lilm- Suit, and than fii'uxixingg 1:110 mum after adding thm'vto sulfur and a poly ifiii 01' an allwii Hie-Ln].

In hwai'imuny wheel-{mi I have sigmsil my name to this sp(- (:i['ic:1ti m.

HAJIME NAGASHIMA, Utnesseq Yusuum 11mm, II. F, HA 11.153. 

